#mask {
    position: fixed;
    top: 0;
    display: block;
    width: 100vw;
    height: 100vh;
    background-color: #636161;
    z-index: 999;
} 

#mask #loading {
    /* 加载器先隐藏起来  */
    /* display: none;  */
    margin: 40vh, auto;
    transform: scale(2);
}

#mask .tip {
    color: aliceblue;
    margin: 40vh, auto;
    display: block;
    width: fit-content;
} 
